linux-kernel - Re: [PATCH v3 5/6] nvme-fc: avoid race between time out and tear down

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Message-ID: <376e5dd0-a6e1-0018-9048-abcb6f405eaf@suse.de>
Date:   Tue, 20 Jul 2021 19:56:04 +0200
From:   Hannes Reinecke <hare@...e.de>
To:     Daniel Wagner <dwagner@...e.de>, linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        James Smart <james.smart@...adcom.com>,
        Keith Busch <kbusch@...nel.org>,
        Ming Lei <ming.lei@...hat.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        James Smart <jsmart2021@...il.com>,
        Chao Leng <lengchao@...wei.com>
Subject: Re: [PATCH v3 5/6] nvme-fc: avoid race between time out and tear down

On 7/20/21 2:43 PM, Daniel Wagner wrote:
> From: James Smart <jsmart2021@...il.com>
> 
> To avoid race between time out and tear down, in tear down process,
> first we quiesce the queue, and then delete the timer and cancel
> the time out work for the queue.
> 
> This patch merges the admin and io sync ops into the queue teardown logic
> as shown in the RDMA patch 3017013dcc "nvme-rdma: avoid race between time
> out and tear down". There is no teardown_lock in nvme-fc.
> 
> Signed-off-by: James Smart <jsmart2021@...il.com>
> CC: Chao Leng <lengchao@...wei.com>
> Tested-by: Daniel Wagner <dwagner@...e.de>
> [dwagner: updated commit id referenced in commit message]
> Reviewed-by: Daniel Wagner <dwagner@...e.de>
> ---
>   drivers/nvme/host/fc.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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